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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
| 4 // met: | 4 // met: |
| 5 // | 5 // |
| 6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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| 151 | 151 |
| 152 // Try to allocate the object without transitioning into C code. If any of | 152 // Try to allocate the object without transitioning into C code. If any of |
| 153 // the preconditions is not met, the code bails out to the runtime call. | 153 // the preconditions is not met, the code bails out to the runtime call. |
| 154 Label rt_call, allocated; | 154 Label rt_call, allocated; |
| 155 if (FLAG_inline_new) { | 155 if (FLAG_inline_new) { |
| 156 Label undo_allocation; | 156 Label undo_allocation; |
| 157 | 157 |
| 158 #ifdef ENABLE_DEBUGGER_SUPPORT | 158 #ifdef ENABLE_DEBUGGER_SUPPORT |
| 159 ExternalReference debug_step_in_fp = | 159 ExternalReference debug_step_in_fp = |
| 160 ExternalReference::debug_step_in_fp_address(masm->isolate()); | 160 ExternalReference::debug_step_in_fp_address(masm->isolate()); |
| 161 __ movq(kScratchRegister, debug_step_in_fp); | 161 __ Move(kScratchRegister, debug_step_in_fp); |
| 162 __ cmpq(Operand(kScratchRegister, 0), Immediate(0)); | 162 __ cmpq(Operand(kScratchRegister, 0), Immediate(0)); |
| 163 __ j(not_equal, &rt_call); | 163 __ j(not_equal, &rt_call); |
| 164 #endif | 164 #endif |
| 165 | 165 |
| 166 // Verified that the constructor is a JSFunction. | 166 // Verified that the constructor is a JSFunction. |
| 167 // Load the initial map and verify that it is in fact a map. | 167 // Load the initial map and verify that it is in fact a map. |
| 168 // rdi: constructor | 168 // rdi: constructor |
| 169 __ movq(rax, FieldOperand(rdi, JSFunction::kPrototypeOrInitialMapOffset)); | 169 __ movq(rax, FieldOperand(rdi, JSFunction::kPrototypeOrInitialMapOffset)); |
| 170 // Will both indicate a NULL and a Smi | 170 // Will both indicate a NULL and a Smi |
| 171 ASSERT(kSmiTag == 0); | 171 ASSERT(kSmiTag == 0); |
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| 593 // For now, we are relying on the fact that make_code_young doesn't do any | 593 // For now, we are relying on the fact that make_code_young doesn't do any |
| 594 // garbage collection which allows us to save/restore the registers without | 594 // garbage collection which allows us to save/restore the registers without |
| 595 // worrying about which of them contain pointers. We also don't build an | 595 // worrying about which of them contain pointers. We also don't build an |
| 596 // internal frame to make the code faster, since we shouldn't have to do stack | 596 // internal frame to make the code faster, since we shouldn't have to do stack |
| 597 // crawls in MakeCodeYoung. This seems a bit fragile. | 597 // crawls in MakeCodeYoung. This seems a bit fragile. |
| 598 | 598 |
| 599 // Re-execute the code that was patched back to the young age when | 599 // Re-execute the code that was patched back to the young age when |
| 600 // the stub returns. | 600 // the stub returns. |
| 601 __ subq(Operand(rsp, 0), Immediate(5)); | 601 __ subq(Operand(rsp, 0), Immediate(5)); |
| 602 __ Pushad(); | 602 __ Pushad(); |
| 603 __ movq(arg_reg_2, | 603 __ Move(arg_reg_2, ExternalReference::isolate_address(masm->isolate())); |
| 604 ExternalReference::isolate_address(masm->isolate())); | |
| 605 __ movq(arg_reg_1, Operand(rsp, kNumSafepointRegisters * kPointerSize)); | 604 __ movq(arg_reg_1, Operand(rsp, kNumSafepointRegisters * kPointerSize)); |
| 606 { // NOLINT | 605 { // NOLINT |
| 607 FrameScope scope(masm, StackFrame::MANUAL); | 606 FrameScope scope(masm, StackFrame::MANUAL); |
| 608 __ PrepareCallCFunction(1); | 607 __ PrepareCallCFunction(1); |
| 609 __ CallCFunction( | 608 __ CallCFunction( |
| 610 ExternalReference::get_make_code_young_function(masm->isolate()), 1); | 609 ExternalReference::get_make_code_young_function(masm->isolate()), 1); |
| 611 } | 610 } |
| 612 __ Popad(); | 611 __ Popad(); |
| 613 __ ret(0); | 612 __ ret(0); |
| 614 } | 613 } |
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| 626 CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR) | 625 CODE_AGE_LIST(DEFINE_CODE_AGE_BUILTIN_GENERATOR) |
| 627 #undef DEFINE_CODE_AGE_BUILTIN_GENERATOR | 626 #undef DEFINE_CODE_AGE_BUILTIN_GENERATOR |
| 628 | 627 |
| 629 | 628 |
| 630 void Builtins::Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm) { | 629 void Builtins::Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm) { |
| 631 // For now, as in GenerateMakeCodeYoungAgainCommon, we are relying on the fact | 630 // For now, as in GenerateMakeCodeYoungAgainCommon, we are relying on the fact |
| 632 // that make_code_young doesn't do any garbage collection which allows us to | 631 // that make_code_young doesn't do any garbage collection which allows us to |
| 633 // save/restore the registers without worrying about which of them contain | 632 // save/restore the registers without worrying about which of them contain |
| 634 // pointers. | 633 // pointers. |
| 635 __ Pushad(); | 634 __ Pushad(); |
| 636 __ movq(arg_reg_2, ExternalReference::isolate_address(masm->isolate())); | 635 __ Move(arg_reg_2, ExternalReference::isolate_address(masm->isolate())); |
| 637 __ movq(arg_reg_1, Operand(rsp, kNumSafepointRegisters * kPointerSize)); | 636 __ movq(arg_reg_1, Operand(rsp, kNumSafepointRegisters * kPointerSize)); |
| 638 __ subq(arg_reg_1, Immediate(Assembler::kShortCallInstructionLength)); | 637 __ subq(arg_reg_1, Immediate(Assembler::kShortCallInstructionLength)); |
| 639 { // NOLINT | 638 { // NOLINT |
| 640 FrameScope scope(masm, StackFrame::MANUAL); | 639 FrameScope scope(masm, StackFrame::MANUAL); |
| 641 __ PrepareCallCFunction(1); | 640 __ PrepareCallCFunction(1); |
| 642 __ CallCFunction( | 641 __ CallCFunction( |
| 643 ExternalReference::get_mark_code_as_executed_function(masm->isolate()), | 642 ExternalReference::get_mark_code_as_executed_function(masm->isolate()), |
| 644 1); | 643 1); |
| 645 } | 644 } |
| 646 __ Popad(); | 645 __ Popad(); |
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| 1437 __ bind(&ok); | 1436 __ bind(&ok); |
| 1438 __ ret(0); | 1437 __ ret(0); |
| 1439 } | 1438 } |
| 1440 | 1439 |
| 1441 | 1440 |
| 1442 #undef __ | 1441 #undef __ |
| 1443 | 1442 |
| 1444 } } // namespace v8::internal | 1443 } } // namespace v8::internal |
| 1445 | 1444 |
| 1446 #endif // V8_TARGET_ARCH_X64 | 1445 #endif // V8_TARGET_ARCH_X64 |
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